Cys-11 ADC linker (hydrophilic peptide-maleimide)

CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)CC(=O)N(C)Cc1cc(NC(=O)C(C)NC(=O)C(NC(=O)CCCCCN2C(=O)C=CC2=O)C(C)C)ccc1CO